只为粗暴看一下ES6的字符串模板的性能
网上查找"ES6 字符串模板 +性能"5分钟无果遂写了一个暴力测试。
测试对象：
- +=方式，字符串累加计算方式
- +s1+s2...+sn方式，即传统连加拼接字符串方式
- s.push(s1); s.join('')方式，数组拼接字符串方式
- es6字符串模板
测试方式：各执行times次运算，记录执行时间。
测试结果：
字符串模板的确钢！
不过上述是在Chrome中的测试结果，结果显示字符串模板的性能和字符串连加拼接方式性能大体相当，是+=逐个链接方式性能的5倍左右，array join方式性能最差，不忍直视。
在火狐浏览器下，除了array join依然不忍直视外，其他三种性能表现相当：
，火狐下贴一张撑撑门面就行了。
微软Edge下，结果比较呵呵哒：
除了连加方式外，其他基本上都可以算挂了。。。
IE呢？压根就不支持字符串模板，所以咱就不测了。
下面是测试脚本：
1 (function () { 2 3 let stringPlus = function () { 4 5 //+=运算 6 7 let a = "ahsdgdsd'sadbd'fpdfknsndf"; 8 a += "sgeoejhsshdsksdlkfkfss"; 9 a += "weieotjmn;gjfkawjrbnvjkjke"; 10 a += "sdfnjslkdgfpla;'gjfak"; 11 a += "dsfjpojjagjksfdoaaskksgsf;adn"; 12 a += "wyehfdhfvcxaawjyfbsvkcsajgef"; 13 a += "igvbcxzxgfhpgbsna"; 14 a += "afsvcbhlksjegjfdnalrllfdjnxl"; 15 a += "awshbnlsklesfdnxsxldxdsdhkjklm"; 16 a += "uatesgsjdabsuaadjhcbdsdgcdbchnxkyesuefgdgsdxjhdbxcduhdywgbsihs"; 17 a += "agsccbjzhbcxbwefyouoiUWA8YESSIHCB"; 18 a += "dfasdkcaehwieruefandjcnxzvcuerefha"; 19 a += "vsdrleifhjs489wodjnlgsehufdja"; 20 a += "wegtfyudashnvnxntrwefkhjhfnc"; 21 a += "ASDGFODIUERTGYHJG;OLFJAMGRTYRUGFNDLAKBWYG "; 22 a += "WEGPFHAFSDRRGJNRYTE8Aghjfoueygf"; 23 a += "erfvcdvmcdlfklvcnssejckzdjvcns"; 24 a += "wetufvnckjffbcnmfwuirldncxmlzjn"; 25 a += "fhfhjlkgeiuvlzkjdquevxx,.vnee"; 26 a += "sdchbnzkdn xxcmsbvcosihhsjm.mn soe"; 27 a += "yuuweygfyvczhvqwerhbfvnsjlhvzxv"; 28 a += "qyylkldbhjjfjJHMNVlaefl"; 29 a += "bdkvxknkniruvn,xhlsaeshksjfk z,"; 30 a += "ygufdkfhakvbxcv,nu[gq;hfauhfaks"; 31 a += "asfyerueiwsnjlkZBcharvbhzcablf"; 32 a += "dvcbzkjnvlsujvcz,cwrajklzldnahruf"; 33 a += "siihjscdcnlzzcslfahdwuiednvcaesf"; 34 a += "auhdzcjsfhjsl;ncaaureiwksnvlcl"; 35 a += "iuaehcnslklcseufjsjeotroeiosdn"; 36 a += "waeg;tirueywtrdfghjnxlghfgekfg"; 37 a += "nhgfdhjkf,v'c;lIkzxjfhbnszdv"; 38 a += "zxgfdsuyhjkglckjlYATRGFHJKXJCHASFJ"; 39 a += "afyvhjletd;LJKN;alnksrjfhbhdfn"; 40 a += "bvcxhgehglalksudjhfjdncmxwpljfd"; 41 return a; 42 }, 43 stringPlus2 = function () { 44 45 //连+运算 46 47 let a = "ahsdgdsd'sadbd'fpdfknsndf" 48 + "sgeoejhsshdsksdlkfkfss" 49 + "weieotjmn;gjfkawjrbnvjkjke" 50 + "sdfnjslkdgfpla;'gjfak" 51 + "dsfjpojjagjksfdoaaskksgsf;adn" 52 + "wyehfdhfvcxaawjyfbsvkcsajgef" 53 + "igvbcxzxgfhpgbsna" 54 + "afsvcbhlksjegjfdnalrllfdjnxl" 55 + "awshbnlsklesfdnxsxldxdsdhkjklm" 56 + "uatesgsjdabsuaadjhcbdsdgcdbchnxkyesuefgdgsdxjhdbxcduhdywgbsihs" 57 + "agsccbjzhbcxbwefyouoiUWA8YESSIHCB" 58 + "dfasdkcaehwieruefandjcnxzvcuerefha" 59 + "vsdrleifhjs489wodjnlgsehufdja" 60 + "wegtfyudashnvnxntrwefkhjhfnc" 61 + "ASDGFODIUERTGYHJG;OLFJAMGRTYRUGFNDLAKBWYG " 62 + "WEGPFHAFSDRRGJNRYTE8Aghjfoueygf" 63 + "erfvcdvmcdlfklvcnssejckzdjvcns" 64 + "wetufvnckjffbcnmfwuirldncxmlzjn" 65 + "fhfhjlkgeiuvlzkjdquevxx,.vnee" 66 + "sdchbnzkdn xxcmsbvcosihhsjm.mn soe" 67 + "yuuweygfyvczhvqwerhbfvnsjlhvzxv" 68 + "qyylkldbhjjfjJHMNVlaefl" 69 + "bdkvxknkniruvn,xhlsaeshksjfk z," 70 + "ygufdkfhakvbxcv,nu[gq;hfauhfaks" 71 + "asfyerueiwsnjlkZBcharvbhzcablf" 72 + "dvcbzkjnvlsujvcz,cwrajklzldnahruf" 73 + "siihjscdcnlzzcslfahdwuiednvcaesf" 74 + "auhdzcjsfhjsl;ncaaureiwksnvlcl" 75 + "iuaehcnslklcseufjsjeotroeiosdn" 76 + "waeg;tirueywtrdfghjnxlghfgekfg" 77 + "nhgfdhjkf,v'c;lIkzxjfhbnszdv" 78 + "zxgfdsuyhjkglckjlYATRGFHJKXJCHASFJ" 79 + "afyvhjletd;LJKN;alnksrjfhbhdfn" 80 + "bvcxhgehglalksudjhfjdncmxwpljfd"; 81 return a; 82 }, 83 arrayJoin = function () { 84 85 //array join 86 87 let a = ["ahsdgdsd'sadbd'fpdfknsndf"]; 88 a.push("sgeoejhsshdsksdlkfkfss"); 89 a.push("weieotjmn;gjfkawjrbnvjkjke"); 90 a.push("sdfnjslkdgfpla;'gjfak"); 91 a.push("dsfjpojjagjksfdoaaskksgsf;adn"); 92 a.push("wyehfdhfvcxaawjyfbsvkcsajgef"); 93 a.push("igvbcxzxgfhpgbsna"); 94 a.push("afsvcbhlksjegjfdnalrllfdjnxl"); 95 a.push("awshbnlsklesfdnxsxldxdsdhkjklm"); 96 a.push("uatesgsjdabsuaadjhcbdsdgcdbchnxkyesuefgdgsdxjhdbxcduhdywgbsihs"); 97 a.push("agsccbjzhbcxbwefyouoiUWA8YESSIHCB"); 98 a.push("dfasdkcaehwieruefandjcnxzvcuerefha"); 99 a.push("vsdrleifhjs489wodjnlgsehufdja"); 100 a.push("wegtfyudashnvnxntrwefkhjhfnc"); 101 a.push("ASDGFODIUERTGYHJG;OLFJAMGRTYRUGFNDLAKBWYG "); 102 a.push("WEGPFHAFSDRRGJNRYTE8Aghjfoueygf"); 103 a.push("erfvcdvmcdlfklvcnssejckzdjvcns"); 104 a.push("wetufvnckjffbcnmfwuirldncxmlzjn"); 105 a.push("fhfhjlkgeiuvlzkjdquevxx,.vnee"); 106 a.push("sdchbnzkdn xxcmsbvcosihhsjm.mn soe"); 107 a.push("yuuweygfyvczhvqwerhbfvnsjlhvzxv"); 108 a.push("qyylkldbhjjfjJHMNVlaefl"); 109 a.push("bdkvxknkniruvn,xhlsaeshksjfk z,"); 110 a.push("ygufdkfhakvbxcv,nu[gq;hfauhfaks"); 111 a.push("asfyerueiwsnjlkZBcharvbhzcablf"); 112 a.push("dvcbzkjnvlsujvcz,cwrajklzldnahruf"); 113 a.push("siihjscdcnlzzcslfahdwuiednvcaesf"); 114 a.push("auhdzcjsfhjsl;ncaaureiwksnvlcl"); 115 a.push("iuaehcnslklcseufjsjeotroeiosdn"); 116 a.push("waeg;tirueywtrdfghjnxlghfgekfg"); 117 a.push("nhgfdhjkf,v'c;lIkzxjfhbnszdv"); 118 a.push("zxgfdsuyhjkglckjlYATRGFHJKXJCHASFJ"); 119 a.push("afyvhjletd;LJKN;alnksrjfhbhdfn"); 120 a.push("bvcxhgehglalksudjhfjdncmxwpljfd"); 121 return a.join(''); 122 }, 123 stringTemplate = function () { 124 125 //字符串模板 126 127 let a1 = "ahsdgdsd'sadbd'fpdfknsndf", 128 a2 = "sgeoejhsshdsksdlkfkfss", 129 a3 = "weieotjmn;gjfkawjrbnvjkjke", 130 a4 = "sdfnjslkdgfpla;'gjfak", 131 a5 = "dsfjpojjagjksfdoaaskksgsf;adn", 132 a6 = "wyehfdhfvcxaawjyfbsvkcsajgef", 133 a7 = "igvbcxzxgfhpgbsna", 134 a8 = "afsvcbhlksjegjfdnalrllfdjnxl", 135 a9 = "awshbnlsklesfdnxsxldxdsdhkjklm", 136 a10 = "agsccbjzhbcxbwefyouoiUWA8YESSIHCB"; 137 let a = `${a1}${a2}${a3}${a4}${a5}${a6}${a7}${a8}${a9}uatesgsjdabsuaadjhcbdsdgcdbchnxkyesuefgdgsdxjhdbxcduhdywgbsihs${a10}${"dfasdkcaehwieruefandjcnxzvcuerefha"}vsdrleifhjs489wodjnlgsehufdja${"wegtfyudashnvnxntrwefkhjhfnc"}${"ASDGFODIUERTGYHJG;OLFJAMGRTYRUGFNDLAKBWYG "}${"WEGPFHAFSDRRGJNRYTE8Aghjfoueygf"}${"erfvcdvmcdlfklvcnssejckzdjvcns"}${"wetufvnckjffbcnmfwuirldncxmlzjn"}${"fhfhjlkgeiuvlzkjdquevxx,.vnee"}${"sdchbnzkdn xxcmsbvcosihhsjm.mn soe"}${"yuuweygfyvczhvqwerhbfvnsjlhvzxv"}qyylkldbhjjfjJHMNVlaefl${"bdkvxknkniruvn,xhlsaeshksjfk z,"}${"ygufdkfhakvbxcv,nu[gq;hfauhfaks"}${"asfyerueiwsnjlkZBcharvbhzcablf"}${"dvcbzkjnvlsujvcz,cwrajklzldnahruf"}${"siihjscdcnlzzcslfahdwuiednvcaesf"}${"auhdzcjsfhjsl;ncaaureiwksnvlcl"}${"iuaehcnslklcseufjsjeotroeiosdn"}${"waeg;tirueywtrdfghjnxlghfgekfg"}${"nhgfdhjkf,v'c;lIkzxjfhbnszdv"}${"zxgfdsuyhjkglckjlYATRGFHJKXJCHASFJ"}${"afyvhjletd;LJKN;alnksrjfhbhdfn"}bvcxhgehglalksudjhfjdncmxwpljfd` 138 return a; 139 }; 140 141 //stringPlus 142 let start = new Date().getTime(), 143 string = "", 144 times = 1000000; 145 console.info('操作次数 -> ' + times); 146 for(let i = 0; i < times; i++){ 147 string = stringPlus(); 148 } 149 let end = new Date().getTime(); 150 console.info("string plus -> " + (end - start)); 151 152 //stringPlus2 153 start = new Date().getTime(); 154 string = ""; 155 for(let i = 0; i < times; i++){ 156 string = stringPlus2(); 157 } 158 end = new Date().getTime(); 159 console.info("string plus 2 -> " + (end - start)); 160 161 //arrayJoin 162 start = new Date().getTime(); 163 string = ""; 164 for(let i = 0; i < times; i++){ 165 string = arrayJoin(); 166 } 167 end = new Date().getTime(); 168 console.info("array join -> " + (end - start)); 169 170 //stringTemplate 171 start = new Date().getTime(); 172 string = ""; 173 for(let i = 0; i < times; i++){ 174 string = stringTemplate(); 175 } 176 end = new Date().getTime(); 177 console.info("string template -> " + (end - start)); 178 179 })();
